Batman Detective Comics Hc Vol 01 Mythology

Alfred Pennyworth...attacked at Wayne manor! Whos hunting those closest to Batman? Commissioner Gordon calls in the Dark Knight Detective when theres a murder at the Gotham City Aquariumstaged to look exactly like Thomas and Martha Waynes crime scene, right down to the playbill and pearls. How does this bizarre homicide tie into the shadowy monster that attacks Dr. Leslie Thompkins? This creature looks to wage a war on Batmanand its using Joker gas to do it! Collects Detective Comics #994-999.